.read-aloud-btn {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background-color: #3B82F6;
    color: white;
    padding: 12px;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1000;
}

.read-aloud-btn:hover {
    transform: translateY(-50%) scale(1.1);
    background-color: #1E40AF;
}

.read-aloud-btn.active {
    background-color: #EF4444;
}

.read-aloud-btn.active:hover {
    background-color: #DC2626;
}

.read-aloud-btn i {
    font-size: 20px;
} 